"The advice and feedback I've received from Gustavo has been priceless. It has been insightful, while also inspiring me to push myself and further my learning by means of critical evaluation and intelligent study. Gustavo taught me things you simply would not find in a book, but only from the years of hard work and dedication this man has so obviously invested in his craft. He is highly personable, and very generous with his knowledge and expertise. Highly recommended. "